Side by side

Biatec T. G. MasarykvsIslander Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Add a watch
T. G. Masaryk
BiatecT. G. Masaryk
MSRP $2,214
Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311
IslanderIslander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311
MSRP $399
Buy from Biatec ↗
Buy used on eBay ↗
Buy from Islander ↗
Buy used on eBay ↗

At a glance

13 of 29 specs differ
Diameter
T. G. Masaryk40mm
Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-31140mm
Power Reserve
T. G. Masaryk41h
Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311—
Water Resistance
T. G. Masaryk100m
Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311200m
MSRP
T. G. Masaryk$2,214
Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311$399

Full specifications

Case

5 specs
Category
—
Diver
Thickness
11.15mm
13.5mm
Material
316L Stainless Steel
Stainless Steel
Finish
Brushed and polished
—
Water Resistance
100m
200m

Crystal & Dial

3 specs
AR Coating
Inner
Yes
Dial Color
Beige
—
Indices
Applied
—

Movement

4 specs
Caliber
Sellita SW200-1
Seiko NH35
Beat Rate
28,800 vph
0 vph
Power Reserve
41h
0h
Jewels
25
0

Pricing

1 specs
MSRP
—
$399
Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Feynman Timekeepers Coalesce
Feynman Timekeepersmicro

Coalesce

6 variantsRef. the-panda
39mm·Automatic
$5,448MSRP
—Used
Zelos Swordfish 3
Zelosmicro

Swordfish 3

40/42mm
2 watches · 35 variantsSwordfish
40/42mm·Automatic·200m WR
$399MSRP
—Used
Maen Manhattan 37 IFL Edition
Maenmicro

Manhattan 37 IFL Edition

8 watches · 30 variantsManhattan
37mm·Automatic·100m WR
$1,199MSRP
—Used
William Wood Fearless
William Woodmicro

Fearless

3 variantsFearless
39mm·Automatic·100m WR
$920MSRP
—Used
Beaufort Permian Rift
Beaufortmicro

Permian Rift

4 variantsRef. permian-rift-azurite
38mm·Automatic
—MSRP
—Used
Sheffield 1A
Sheffieldmicro

1A

2 variantsRef. diver-1a-40mm-white
40mm·Automatic·200m WR
$223MSRP
—Used
Lucky Harvey Chiming Horse
Lucky Harveymicro

Chiming Horse

3 variantsRef. chiming-automaton-horse-watch-in-grade-5-titanium-alloy-blue-2026-collector-s-edition
39mm·Automatic
$2,399MSRP
—Used
Praesidus 42mm Automatic
Praesidusmicro
A-11 Tom RiceA-11

42mm Automatic

9 watches · 31 variantsA-11
38mm·Automatic·100m WR
$680MSRP
—Used
All alternatives to the T. G. Masaryk →All alternatives to the Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311 →
Explore the full catalog

Follow this matchup

Get a note when Biatec T. G. Masaryk vs Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311 gets more votes, a community discussion, or a price drop. No account needed.

Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.

Feynman Timekeepers CoalescevsIslander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311vsMaen Manhattan 37 IFL EditionBeaufort Permian RiftvsIslander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311Islander Bayport Automatic Dive Watch with Blue Wave Dial #ISL-311vsLucky Harvey Chiming HorseBiatec T. G. MasarykvsZelos Swordfish 3Biatec T. G. MasarykvsWilliam Wood Fearless
Edit this comparisonAdd another watchExplore more 39–41mm watches